Integrated Optimization of Control System for Smart Cylindrical Shells Using Modified GA
Publication: Journal of Aerospace Engineering
Volume 19, Issue 2
Abstract
In this paper, modeling of the vibration of cylindrical shell components of space structures incorporating piezoelectric sensor/actuators (S/As) for optimal vibration control is proposed and formulated. The parameters of the control system, which include the placement and sizing of the piezoelectric S/As and the feedback control gains, were considered as design variables and optimized simultaneously. The effect of the amount of piezoelectric patches was investigated as well. The criterion based on the maximization of energy dissipation was employed for the optimization of the control system. A modified real-encoded genetic algorithm (GA) dealing with various constraints has been developed and applied to search for the optimal placement and size of the piezoelectric patches as well as the optimal feedback control gains. The results of three numerical examples, which include a simply supported plate, a simply supported cylindrical shell, and a clamped-simply supported plate, demonstrated significant vibration suppression based on the optimal design of the control system. It was also found that for specific controlled vibration modes, the optimal distribution of the piezoelectric S/As should be located at the areas separated by the nodal lines to achieve the optimal control effect. This finding would be useful for the practical design of smart structures.
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Published In
Journal of Aerospace Engineering
Volume 19 • Issue 2 • April 2006
Pages: 68 - 79
Copyright
© 2006 ASCE.
History
Received: Nov 7, 2002
Accepted: Jun 16, 2005
Published online: Apr 1, 2006
Published in print: Apr 2006
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